Multiple questions/problems regarding the Orizon Theme.

I recently updated to the new version of the Orizon Theme, since then I got a few problems:

1. My posts won’t show anymore on the pages, before I was using this command in order to show the posts:

[post category_name="Gaming News" totalposts="7"]

But now it won’t work anymore, it just shows me the command instead of the posts.

2. How can I make the sidebar I got on the homepage appear on every page & posts or make the post “wide”, I reffer to the option you got on a page that allows you to make it full size.

3. Is it possible to revert ot the old stars style? the new ones are pretty messed up: